Jan-Philipp Kolb
04/13/2015
A road map is one of the most widely used map types.
These maps show major and minor highways and roads (depending on detail)
as well as things like airports, city locations and points of interest like parks, campgrounds and monuments.
Major highways on a road map are generally red and larger than other roads,
while minor roads are a lighter color and a narrower line.
install.packages("ggmap")
librarylibrary(ggmap)
qmap("Mannheim")
qmap("Berlin Brandenburger Tor")
qmap("Germany")
qmap("Germany", zoom = 6)
?qmap
Different components in the help
```
qmap("Mannheim", zoom = 12)